Abstract
This study was designed to investigate whether daidzein inhibits α-glucosidase and α-amylase activities and alleviates postprandial hyperglycemia in streptozotocin-induced diabetic mice. Daidzein showed prominent inhibitory effects against α-glucosidase and α-amylase. The IC50 values of daidzein against α-glucosidase and α-amylase were 0.048 and 0.301mmol, respectively, which showed that daidzein was more effective than acarbose. The increase in postprandial blood glucose levels was more significantly suppressed in the daidzein-administered group than in the water group of both streptozotocin-induced diabetic and normal mice. Moreover, the area under the curve was significantly lowered following daidzein administration (2043 versus 2475mmolminl) in the streptozotocin-induced diabetic mice. These results indicated that daidzein may be a potent α-glucosidase inhibitor and suppress the postprandial hyperglycemia caused by starch.
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